Avoid duplicating ReportAdmin search params (fixes #8046)
Avoid duplicating ReportAdmin search params (fixes #8046)

silverstripe-labs/silverstripe-reports,dhensby/silverstripe-reports,dhensby/silverstripe-cms,jonom/silverstripe-cms,dhensby/silverstripe-cms,silverstripe/silverstripe-siteconfig,helpfulrobot/i-lateral-silverstripe-siteconfig,jonom/silverstripe-cms,silverstripe-labs/silverstripe-reports,dhensby/silverstripe-cms,dhensby/silverstripe-reports,silverstripe/silverstripe-cms,silverstripe/silverstripe-cms